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Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Taxes [Abstract] |  |  |
Measurement period adjustment | $ 4.4 |  |
Domestic | 93.1 | $ 96.7 | $ 72.9
Foreign | 111.0 | 94.2 | 97.4
Income from operations before tax and equity in earnings | 204.1 | 190.9 | 170.3
Domestic [Abstract] |  |  |
Taxes currently payable, Federal | (3.7) | 46.0 | 18.7
Taxes currently payable, State and local | 1.4 | 2.4 | 4.4
Deferred income taxes | 11.1 | (78.1) | (8.8)
Domestic tax provision (benefit) | 8.8 | (29.7) | 14.3
Foreign [Abstract] |  |  |
Taxes currently payable | 21.3 | 21.1 | 23.2
Deferred income taxes | 4.3 | 2.0 | (2.2)
Foreign tax provision | 25.6 | 23.1 | 21.0
Total tax provision (benefit) | $ 34.4 | $ (6.6) | $ 35.3
Reconciliation of U. S. federal statutory tax rate to effective tax rate [Abstract] |  |  |
U.S. statutory rate | 21.00% | 35.00% | 35.00%
Depletion | (3.90%) | (6.70%) | (6.60%)
Difference between tax provided on foreign earnings and the US statutory rate | 1.10% | (3.80%) | (6.40%)
Global Intangible Low-Tax Income (GILTI) | 0.80% | 0.00% | 0.00%
Foreign Derived Intangible Income | (0.70%) | 0.00% | 0.00%
State and local taxes, net of federal tax benefit | 1.90% | 1.10% | 1.10%
Tax credits and foreign dividends | (0.30%) | 0.30% | 0.60%
Change in valuation allowance | 0.00% | (1.90%) | (1.10%)
Impact of uncertain tax positions | 0.50% | 0.40% | 0.40%
Impact of officer's non-deductible compensation | 0.80% | 0.80% | 0.10%
Manufacturing deduction | (0.00%) | (1.60%) | (2.00%)
Impact of U.S. Tax Reform | (2.20%) | (24.80%) | (0.00%)
Other | (2.10%) | (2.30%) | (0.40%)
Consolidated effective tax rate | 16.90% | (3.50%) | 20.70%
Deferred tax assets attributable to [Abstract] |  |  |
Accrued liabilities | $ 22.2 | $ 28.6 |
Net operating loss carry forwards | 34.4 | 33.2 |
Pension and post-retirement benefits costs | 33.8 | 40.4 |
Other | 28.6 | 22.0 |
Valuation allowance | (22.0) | (21.4) |
Total deferred tax assets | 97.0 | 102.8 |
Deferred tax liabilities attributable to [Abstract] |  |  |
Plant and equipment, principally due to differences in depreciation | 182.8 | 161.6 |
Intangible assets | 69.5 | 63.4 |
Other | 15.2 | 11.6 |
Total deferred tax liabilities | 267.5 | 236.6 |
Net deferred tax asset (liability) | (170.5) | (133.8) |
Current and long-term portion of net deferred tax assets [Abstract] |  |  |
Net deferred tax asset, long-term | 26.3 | 25.6 |
Net deferred tax liability, long-term | 196.8 | 159.4 |
Net deferred tax asset (liability), long-term | (170.5) | (133.8) |
Operating loss carryforwards [Abstract] |  |  |
Deferred tax assets arising from tax loss carry forwards which will be realized through future operations | $ 34.4 |  |
Expiration period | 20 years |  |
Unrecognized tax benefits [Abstract] |  |  |
Unrecognized tax benefits that would impact effective tax rate | $ 13.2 |  |
Unrecognized tax benefits [Roll forward] |  |  |
Balance at beginning of the year | 14.7 | 13.7 |
Increases related to current year positions | 0.6 | 1.2 |
Increases related to new judgments | 1.3 | 1.2 |
Decreases related to audit settlements and statute expirations | 0.0 | (1.4) |
Balance at the end of the year | 16.6 | 14.7 | $ 13.7
Income Tax Penalties and Interest Expense [Abstract] |  |  |
Unrecognized tax benefits, interest and penalties | 0.9 |  |
Unrecognized tax benefits, accrued interest and penalties | 2.5 |  |
Cash paid for income taxes [Abstract] |  |  |
Net cash Income taxes paid | 43.8 | $ 47.7 | $ 30.6
Undistributed earnings of foreign subsidiaries [Abstract] |  |  |
Foreign subsidiaries' undistributed earnings | 507.8 |  |
Deferred tax liabilities with respect to foreign withholding taxes or state taxes have been recognized | 0.0 |  |
Finite lived tax loss carry forwards [Member] |  |  |
Operating loss carryforwards [Abstract] |  |  |
Deferred tax assets arising from tax loss carry forwards which will be realized through future operations | 17.1 |  |
Indefinite lived tax loss carry forwards [Member] |  |  |
Operating loss carryforwards [Abstract] |  |  |
Deferred tax assets arising from tax loss carry forwards which will be realized through future operations | $ 17.3 |  |

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